CVE-2009-3602 json
Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be…
published 2009-10-13 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3583
- cvss
- 7.5
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.0%
- EPSS 3.0% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.
Patch / fix
- unbound Debian 14, Debian 13, Debian 12 1.3.4-1
debian advisories DEBIAN-CVE-2009-3602
Exploit prediction
2.98% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-310 Cryptographic Issues
References
-
debian.org
/security/2009/dsa-1963
vendor-advisory
-
secunia.com
/advisories/36996
third-party-advisory, vendor-advisory
-
unbound.net
/pipermail/unbound-users/2009-October/000852.html
mailing-list, vendor-advisory
-
vupen.com
/english/advisories/2009/2875
vdb-entry, vendor-advisory
-
secunia.com
/advisories/37913
third-party-advisory
-
openwall.com
/lists/oss-security/2009/10/09/3
mailing-list
-
exchange.xforce.ibmcloud.com
/vulnerabilities/53729
vdb-entry
-
openwall.com
/lists/oss-security/2009/10/09/2
mailing-list
-
osvdb.org
/58836
vdb-entry
Sources
- CVE List CVE-2009-3602
- NVD CVE-2009-3602
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.